J/ApJ/863/107 Low-rotating elliptical galaxies in MaNGA (Durazo+, 2018)
A test of MONDian gravity in ∼300 pressure-supported elliptical galaxies from
the MaNGA survey.
Durazo R., Hernandez X., Cervantes Sodi B., Sanchez S.F.
<Astrophys. J., 863, 107-107 (2018)>
=2018ApJ...863..107D 2018ApJ...863..107D (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, radius; Velocity dispersion; Rotational velocities
Keywords: galaxies: fundamental parameters; galaxies: kinematics and dynamics
gravitation; stars: kinematics and dynamics
Abstract:
Pressure-supported systems modeled under Modified Newtonian dynamics
(MOND)ian extended gravity are expected to show an outer flattening in
their velocity dispersion profiles. A characteristic scaling between
the amplitude of the asymptotic velocity dispersion and the radius at
which the flattening occurs is also expected. By comprehensively
analyzing the dynamical behavior of ∼300 extremely low-rotating
elliptical galaxies from the Mapping Nearby Galaxies at APO (MaNGA)
survey, we show this type of pressure-supported system to be
consistent with MONDian expectations, for a range of central velocity
dispersion values of 60 km s-1<σcentral<280km/s and
asymptotic velocity dispersion values of
28km/s<σ∞<250km/s. We find that a universal velocity
dispersion profile accurately describes the studied systems; the
predicted kinematics of extended gravity are verified for all
well-observed galaxies.
Description:
From nearly 3000 elliptical galaxies analyzed using MaNGA Pipe 3D
pipeline (Law+ 2016AJ....152...83L 2016AJ....152...83L ; Sanchez+ 2018RMxAA..54..217S 2018RMxAA..54..217S),
only galaxies with V/σ<0.213 were selected, in accordance with
the values used as selection criterion in Durazo+ (2017ApJ...837..179D 2017ApJ...837..179D).
We thus obtain a subsample composed of 292 low-rotating well-fitted
ellipticals (see Section 3).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 62 292 Fitted parameters with respective errors, rotation
velocity to velocity dispersion ratio measured at
half-light radius, and stellar masses estimated
from Sanchez+ (2018RMxAA..54..217S 2018RMxAA..54..217S) for our
292 ellipticals
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See also:
J/A+A/462/L9 : Radial velocities in NGC 7099 (Scarpa+, 2007)
J/A+A/525/A148 : Radial velocities in two globular clusters (Scarpa+, 2011)
J/A+A/530/A31 : Stellar parameters in 10 globular cluster fields (Lane+, 2011)
J/ApJ/738/186 : HST and DEIMOS measurements of NGC 2419 stars (Ibata+, 2011)
J/A+A/544/A115 : Velocities of NGC 4636 globular clusters (Schuberth+, 2012)
J/A+A/560/A9 : AMIGA. The isolation degree (Argudo-Fernandez+, 2013)
J/A+A/564/A94 : CIG sample 3-dimensional environment (Argudo-Fernandez+, 2014)
J/A+A/578/A110 : Isolated gal., pairs and triplets (Argudo-Fernandez+, 2015)
J/ApJ/819/44 : First Fermi-LAT Inner Galaxy point source cat. (Ajello+, 2016)
J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)
J/A+A/594/A36 : CALIFA Survey DR3 list of galaxies (Sanchez+, 2016)
J/MNRAS/469/2121 : Mass-metallicity relation with CALIFA (Sanchez+ 2017)
J/AJ/154/86 : MaNGA catalog, DR15 (Wake+, 2017)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/292] Internal index number
5- 10 A6 --- --- [manga-]
11- 20 A10 --- MaNGA MaNGA identifier (NNNN-NNNNN)
22- 26 F5.1 km/s sigma0 [17/118] Central velocity dispersion
28- 31 F4.1 km/s e_sigma0 [5/43] Uncertainty in sigma0
33- 36 F4.1 kpc Rsigma [0.6/16.7] Radius (1)
38- 40 F3.1 kpc e_Rsigma [0.1/5] Uncertainty in Rsigma
42- 46 F5.1 km/s sigmainf [27.9/243] Asymptotic value of velocity
dispersion profile
48- 51 F4.1 km/s e_sigmainf [1.8/47] Uncertainty in sigmainf
53- 57 F5.3 --- V/sigma [0.039/0.22] Ratio of rotation velocity to
velocity dispersion
59- 62 F4.1 [Msun] logMs [9.3/11.5] Log stellar mass
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Note (1): After which the value of σ∞ is quickly approximated.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 03-Oct-2023